High-frame rate four dimensional optoacoustic tomography enables visualization of cardiovascular dynamics and mouse heart perfusion.

High-frame rate four dimensional optoacoustic tomography enables visualization of cardiovascular dynamics and mouse heart perfusion.
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DOI:
10.1038/srep10133
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发表时间:
2015-07-01
期刊:
影响因子:
4.6
通讯作者:
Razansky D
Razansky D
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Deán-Ben XL;Ford SJ;Razansky D

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小鼠心脏健康和疾病模型的功能成像为我们对哺乳动物心脏的基本了解做出了重大贡献。然而,由于小鼠心脏体积小且心率快,对其进行成像面临着巨大的挑战。在这里,我们展示了对小鼠心脏进行高帧率、无创光声成像的可行性。每秒 50 个三维帧的时间分辨率可提供心动周期重要阶段的功能信息,而无需使用门控或其他运动减少方法。通过利用光声信号的波长依赖性来区分心室中的血液氧合状态。还使用吲哚菁绿评估心室血液灌注的实时体积跟踪。总而言之,新发现的功能为整个心脏的体内结构和功能成像提供了一套独特的工具,在所有三个维度上都具有高时空分辨率。
Functional imaging of mouse models of cardiac health and disease provides a major contribution to our fundamental understanding of the mammalian heart. However, imaging murine hearts presents significant challenges due to their small size and rapid heart rate. Here we demonstrate the feasibility of high-frame-rate, noninvasive optoacoustic imaging of the murine heart. The temporal resolution of 50 three-dimensional frames per second provides functional information at important phases of the cardiac cycle without the use of gating or other motion-reduction methods. Differentiation of the blood oxygenation state in the heart chambers was enabled by exploiting the wavelength dependence of optoacoustic signals. Real-time volumetric tracking of blood perfusion in the cardiac chambers was also evaluated using indocyanine green. Taken together, the newly-discovered capacities offer a unique tool set for in-vivo structural and functional imaging of the whole heart with high spatio-temporal resolution in all three dimensions.
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